Many diseases and soilborne insects that attack plants remain in the soil even after you harvest the crop. They wait there to reinfest susceptible plants. If you plant the same crop or a closely related one in that site a disease or insect will probably attack the new planting. Prevent this needless loss by rotating your crops each year. The practice costs nothing and could save a lot. Crop rotation requires only a little planning. If you plant tomatoes in one bed this year, then don't plant tomatoes or a related crop in the same bed for the next two years. If possible, it is best to let at least three years pass before planting where the same or related crop grew before.
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